Bridge creation with "virsh iface-bridge" fails

Environment

• Red Hat Enterprise Linux 7
• virsh

Issue

When installing Red Hat Enterprise Linux 7 from other sources than network, the network devices are not specified by default in the interface configuration files. As a consequence, creating a bridge by using the "iface-bridge" command in the virsh utility fails with an error message.

Resolution

Add the "DEVICE=" lines in the /etc/sysconfig/network-scripts/ifcfg-* files.

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